java - 查找一组 double 值中的异常值

Question

我有一个 double 值列表，我想在其中找到异常值。 weka有提供什么算法来解决这个问题吗？

Answer 1

In this work paper (第一个链接)，您可以使用 WEKA 实现异常值算法的全文。

此外，使用的算法是

proposed in the paper, “A Unified Approach to Detecting Spatial Outliers”, by S. Shekhar et al. The paper shows several spatial outlier detection tests. For example, a variogram-cloud displays data points related by neighborhood relationships. For each pair of locations, the square-root of the absolute difference between attribute values at the locations versus the Euclidean distance between the locations are plotted. In data sets exhibiting strong spatial dependence, the variance in the attribute differences data sets exhibiting strong spatial dependence, the variance in the attribute difference will increase with increasing distance between locations. Locations that are near to one another, but with large attribute differences, might indicate a spatial outlier, even though the values at both locations may appear to be reasonable when examining the data set non-spatially. One major drawback of other outlier detection algorithms leads to some true spatial outliers being ignored and some false spatial outliers being identified.

有关异常值检测的算法，您可以查看此 SIAM tutorial .